Workpiece Material 2.1I.n Wthoriskprieescee aMrcahte,rtihale workpiece material was a block of JIS SKD61 alloy steel (Chun Ying Tool Co., Ltd, ChIann tghhisu rae,sTeaairwcha,n t)hew whiocrhkphiaedcet hmeadteirmiael nwsiaosn as bolfo2c0k0 omf JmIS ...